Hi
If you are running firewire drives, you should be happy that the FC3 kernel hasn't been updated. The 2.6.14 kernels for FC4 and the 2.6.15 in testing won't recognize drives/partitions although the raw ieee1394 layer seems to work.
If you did test 2.6.15, a discussion on fedora-test list might help. --Rahul
Fedora Bug Triaging - http://fedoraproject.org/wiki/BugZappers